People Food
People food like grapes, raisins, avocado can make your pet very sick
One of the worst offenders--chocolate--contains large amounts of methylxanthines, which, if ingested in significant amounts, can cause vomiting, diarrhea, panting, excessive thirst, urination, hyperactivity, and in severe cases, abnormal heart rhythm, tremors and seizures.
Plants
Common houseplants varieties such as azalea, rhododendron, sago palm, lilies are often found in homes and can be harmful to pets. Lilies are especially toxic to cats, and can cause life-threatening kidney failure even in small amounts. Be careful at Christmas time Poinsettias are also poison to our pets
Veterinary Medications
Even though veterinary medications are intended for pets, they're often misapplied or improperly dispensed by well-meaning pet parents. In 2009, the ASPCA managed 7,680 cases involving animal-related preparations such as non-steroidal anti-inflammatory drugs, heartworm preventatives, de-wormers, antibiotics, vaccines and nutritional supplements.
Rat and Mouse poisons
Many baits used to attract rodents contain inactive ingredients that are attractive to pets as well. Depending on the type of rodent poison ingestions can lead to potentially life-threatening problems for pets including bleeding, seizures or kidney damage.
Household Cleaners
Everybody knows that household cleaning supplies can be toxic to adults and children, but few take precautions to protect their pets from common agents such as bleaches, detergents and disinfectants. These products, when inhaled by our furry friends, can cause serious gastrointestinal distress and irritation to the respiratory tract.
Heavy Metals
It's not too much loud music that constitutes our next pet poison offender. Instead, it's heavy metals such as lead, zinc and mercury. Lead is especially pernicious, and pets are exposed to it through many sources, including consumer products, paint chips, linoleum, and lead dust produced when surfaces in older homes are scraped or sanded.
Garden Products
It may keep your grass green, but certain types of fertilizer and garden products can cause problems for outdoor cats and dogs, which can cause severe gastric upset and possibly gastrointestinal obstruction.
Chemical Hazards
A category on the rise, chemical hazards--found in ethylene glycol antifreeze, paint thinner, drain cleaners and pool/spa chemicals--form a substantial danger to pets. Substances in this group can cause gastrointestinal upset, depression, respiratory difficulties and chemical burns.